Liquid-fuel furnace.



W. M. BUR-DON.

LIQUID FUEL FURNACE.

APPLICATION FILED NOV-3.1917.

1,2753%. Patented Aug. 13, 191&

2 SHEETS-SHEET I.

W. M. BUBDON.

LIQUID FUEL FURNACE. 7 APPLICATION FILED NOV- 3. 1917.

1,275,841. I PatentedA11g.13,-l918.

- EETS-SHEET 2.

WILLIA M. BURDON, erBELLsnILL, scorLAnn, mama To nunnons LIMITED, 015"BELLSHILL, SCOTLAND. 1 l i To all whom it may concern: j j j j I Be itknown that I, WIIJLfAM MUR AY BURDoN, asubject of the King of (1rreatBritain, residing at Bellshill, Lanarkshire, Scotland, have inventedcertain newand useful Improvements in Liquid-Fuel Furf naces, of whichthe following a specifica tion. j

This invention relates to liquid fuelfurnaces of the typejknown asfoilgas furnaces, and comprising acarbureter or retort for generating theoil gas from a mixture of oil vapor or spray and air, the object beingto so make such furnaces that brass or other metals and alloys canberapidly and effectively melted therein.

Heretofore, in furnaces of this kind, especially when melting yellowbrass,the spelter was readily volatilized and, after thefurnace had beenrun for some time, subliming took place on the inner surfaceof the finesthereby choking them up, while, at thesame time,the carbureter wasthickly coated.

Under my invention I so construct the furnace that the oil gas flame, orflames, or jet or jets, is, or are, directed intoa primary combustionchamber, this chamber having a cross wall or partition which extends upa distance from the floor and over which the flame or flames can pass tothe melting bath.

The aforesaid cross wall has, preferably, a sloping or curved frontagainst which the flame, or flames, or jet, or jets, can strike and thencurl or bend upward. According to the temperature desired in the bath ofthe furnace the cross wall aforesaid may be raised or lowered (or'addedto or reduced) and this is, preferably, done by having a door at one orboth sides of the furnace through which bricks or blocks can be insertedor withdrawn, the door or doors be ing provided with counter-balancingmeans, or such like, whereby they can be readily raised or lowered.

The furnace is also so made that the bottom of the melting bath can beheated by the hot gases, a heatin chamber and an arrangement of fluesheing provided for the purpose, and, further, a flue arrangement isprovided whereby the carbureter, which is a well known feature in theBurdon oil gas furnaces, may be directly heated by the hot gases fromthe primary combustion chamber and independently of the heating of thebath. Provision is, or may be, also LIQUID-FUEL FURNACE.

. Specification of Letters Patent. 3 PatentedAug; 13, 1918, flpplieationfilaments a ien. seria naaoaoat. a I

made whereby thehot gasescanbe shut off from the melting bath duringre-charging. On the "drawings annexed I haveshown, by way ofillustration or example, one mode of constructing a brassmelting furnacein accordance with m y invention.

Figure 1 isa sectional elevation the a furnace. j j [Fig.2. is asectional plan, while Fig, 3 a vertical cross section on the line B,"Fig. l, and Fig. 4a vertical cross section on theline C, D, Fig. 1 Inconstructing the furnace? in accordance with the arrangement shown onthe drawings,I provide a low wall or bridge 6 across theheating space orchamber 0 and just in advance of the bath the wall or bridge dividingthe chamber into two parts, the first part being the primary combustionchamber cl andthe second part the melting chamber or bath 6. The crosswall or bridge at the combustion chamber side is inclined or an gledmore or less, as shown at 7, according tothe manner in which itisdesireditode flect the hot gases which impinge upon it from the usualburner g. Below the bottom ofthe bath there is heating chamber h andfluesi, z, are arranged in such manner as to direct a portion of the hotgases from the combustion chamber it had the heating chamber h fromwhence they pass upward through the outlet flues j. The main portion ofthe hot gases from the combustion chamber pass upward toward the crownof the furnace (see arrow 02) and then to the melting bath 6 so as toheat the metal therein and, thereafter, escape by means of back flues 9'to the main flue. A further portion ofthe gases from the combustionchamber is directed upward through flues k, in the crown of thecombustion chamber, so as to heat the usual carbureter Z and,thereafter, pass away by the main flue m or, in some cases, they may beallowed to pass away directly through separate flues or passages aregulated by a damper 0 and arranged above the carbureter and over thecombustion chamber. The arrows show the various paths followed by thehot gases.

The cross wall I) prevents direct impingement of the flame upon themetal in the bath and it also reduces the pressure of the hot gasestherein. The highly heated gases from the combustion chamber are carriedover the top of the Wall and distributed as j evenly oyer the baththereby giving a much more rapid and much more satisfactory meltingthan-heretofore. aTheflues-j awhioh are arranged as w1ll be seen,ust;above thelevel of the metal in the bath, tend to draw down the hotgases over the top oftheim'etal. a

The furnace shown on the drawings isa fixture .but, ilif ,Cl6SlI'6(l,sit may ber-mounted.

upon trunnions or pivots and be adapted to tilt, in which case the oilsupply and air supply-pipes wouldbe flexible. V

,The improvements can, of cours'e,if so desired, -be. applied toannealing, case-harden ing,.'and other low temperature furnaces of thev.typel referred to, the crossjwallfbeing arranged to sepa-rate,,moreorless, theprimarycombustion chamber from the heating chamber.

Of course the ,general construction ofthe furnace could be altered orvaried to, suit the metal or metals being melted or the 7 amountthereofto' betreated at'each charge.

then through the lower chamberandthence to the [outlet flue.

[2. Ali'quid fuel furnace of the type referred .to, made :with aprimarycombustion chamber and a heating chamber the chambers being partiallyseparated from one an- :fronn theaprimary combustion chamber, a "passageextending from the primary chamber through the cross wall to thmsaidbottom chamber and a passage extending from thence'to the outlet flue.

3. A liquid fuel furnace of the type referred to, made witlra primarycombustion chamber into whichthe gases are directed, a heating chamber,a cross Wall partially separating the chambers, a :bottom chamber belowthe. said heating chamber, an inclined passage extending from theprimary chamber to the bottom chamber, an outlet flue from the bottomchamber andan outlet passage from the; heating chamber to said flue.

4. A liquid fuel furnace of the type referred to, made with a'primarycombustion chamber into. which the gases are directed, a heatingchamber, a crosswall between the chambers, a passage over said wall, abottom cl'iamber below the said heating ormelting chamber,-a pluralityof passages extending from the. primary chamber to the bottom chamber,an outlet flue .from the bottom chamber and an'outl et passage from theheating chamber.

In testimony-whereof I, aflix my signature in presence of two witnesses.

WM. M. BURDON.

' Witnesses:

' HUGH D. FITZPATRICK,

.VVILLIAM GALL.

, "Gopiesio'! this patent may bebbtained for five cents each, .byaddressing the Commissioner ot'Patentl.

. Washington; 'D. G.

